Monday November 11, 2024
Fish Farmer —
An article published recently in the scientific journal Aquaculture Environment Interactions show that the economic consequences of a jellyfish incident can be quite long lasting.
The past year has seen an increase in jellyfish zooplankton incidents (jellyfish and related organisms) causing fish kills and economic losses to aquaculture companies, particularly in Norway.
The report says the stingers in their tentacles can injure and even kill fish in pens. Although precautions against jellyfish blooms are increasingly used, the effects of jellyfish tentacles, which can easily break off and float around, have not been taken into account.
These floating tentacles with active stingers can injure fish even after the jellyfish swarm has left the area, but for how long was unknown. In this study, it was indirectly assessed how long these tentacles of a lion’s mane jellyfish (Cyanea capillata), can continue to injure fish in pens after they are released from the jellyfish themselves.